Auto z height configuration

I am running repetier 92.9 on my homemade Cartesian. I built in a z probe thinking I would use the autolevel system that repetier has but found the bed is dead level so no need for it. However, I do use different bed surfaces and would like to use the z probe to set the z height. The probe is built into the nozzle assy so no offset is needed and I use a z max endstop.
What Goode command would I use to simply probe and report the z height and place the value in the eeprom?